Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837133 | Photographic four-color material for the silver dye bleach process | — | 1989-06-06 |
| 4701525 | Polyazo dyestuffs having high UV absorption | Thomas Rohr | 1987-10-20 |
| 4609609 | UV-absorbent compounds, process for their preparation and their use as image dyes in photographic materials for the silver dye bleach process | Thomas Rohr | 1986-09-02 |